Portable and adaptable work benches, particularly in the field of building construction. Background to the invention

On building sites it is often necessary to use a work bench in order to construct a part of an installation for the building project. Furthermore, due to the incomplete nature of a building site and the various tools and plant which are in operation, building sites are subject to strict health and safety requirements to ensure the well-being of the workers.

There exists a need for an adaptable and portable work bench that meets modern health and safety standards and assists the workers in efficient and safe working when using the bench and moving the bench around the work site.

Summary of invention Aspects of the invention are set out in the accompanying claims.

One aspect of the invention provides a work bench comprising: a frame comprising two frame sides and two bracing arrangements, perpendicular to the frame sides, defining an upper frame having a length determined by the frame sides and a width; and at least one bench top, each having a length corresponding to the width of the frame and a width which is less than half the length of the upper frame, wherein each bench top is removabley attachable to the frame sides at any of at least two corresponding spaced apart attachment locations so that two bench tops can be attached to the upper frame in a side by side arrangement to form a work surface extending along at least part of the length of the upper frame.

Thus, the work bench provides a strong, sturdy, durable, stable and level working surface. The height of the bench is easy to work at. Accordingly, use of the work bench is safe, reduces hazards compared with makeshift benches. Furthermore, the work bench complies with modern health and safety requirements.

The work bench may be used with a standard sheet of plywood as a work top. Alternatively, the work bench could be provided with a specifically designed work surface or used without a work surface and placing work materials directly on the bench tops.

The work bench may be easily assembled from a kit of number of parts by a single person. The work bench may be completely or partially dissembled when not in use or when the work bench needs to be stored or transported. The legs of the work bench are moveable so that they may be folded parallel with the frame side into a more compact configuration. This makes the bench easier to carry or transport in a relatively small vehicle, and store without causing an obstruction.

The work bench is light enough to be carried by a single person. Further, the work bench is strong and stable enough to be lifted by a crane, and has a number of points where a crane chain could be attached, in particular to the bracing arrangement. Conveniently, a handle may be positioned in the frame side of the work bench to allow the work bench to be carried more easily. The work bench may be provided with legs and a hinge arrangement. The foot end of each of the legs may be provided with protective covers. The hinge arrangement that attaches the legs to the bench frame allows the legs to move. The hinge mechanism rests in one of two positions. When the bench is set up for working, the bracing arrangement rests in a notch in the frame side. The shape of the frame side, guides the bracing arrangement into position. Placing a weight on the bench ensures that the bracing arrangement remains in position. Further, an imbalance between the positions of the legs due to an uneven surface is absorbed into the arrangement so that even if the bench were used in such a situation, it remains stable and relatively level.

The hinge mechanism may be reinforced in order to distribute the forces on the mechanism. This means that the work bench is more stable and sturdy and likely to last longer.

Conveniently, the work bench may be made from standard sized metal bars and available wood work. The parts of the work bench may be secured together using standard sized wing nuts or another type of fastener, such as a screw device.

The bench tops may be made from readily available wooden parts. Preferably the bench tops are provided with sacrificial beams. These may be damaged while using the work bench. However, as the bench tops are readily

replaceable, the work bench may quickly be restored to a good condition for working. Furthermore, damaged bench tops may be easily reconditioned to be used again.

The work bench is adaptable for a variety of uses. Further, the work bench may be accessorised to make it more suitable for a particular use. In one arrangement, the work bench may be provided with an electrical attachment point so that cables for power tools may be effectively managed so that they do not cause a hazard. Another aspect of the invention provides a fixing comprising: a main body, a back plate, and a protruding front portion having a securement hole extending from an upper surface to a lower surface, wherein at least a portion of the inner surface of the hole is arranged to secure an attachment, wherein the back plate has at least an upper bracing surface separate to and offset from the upper surface of the main body, the fixing further comprising at least two secondary holes arranged substantially perpendicular to the securement hole for removably attaching the fixing to another object.

The fixing allows bench tops to be securely attached to a work bench. The fixing can be used for alternative uses, for example, fixing false ceilings or constructing working platforms. The fixing allows any forces put on the joint between two parts to be distributed. Thereby, the fixing makes the joint more secure and able to take greater forces. Furthermore, the fixing is less likely to move and or fail.

Description of Invention

In order that the present invention may be more readily understood,

embodiments thereof will now be described, by way of example, with reference to the accompanied drawings, in which:

Figure 1 provides an overview illustration of a work bench;

Figure 1 a provides an overview illustration of an alternative work bench;

Figure 2 illustrates a side view of an assembled work bench;

Figure 3 illustrates a bracing bar assembly;

Figure 4 illustrates the bottom face of a bench top; Figure 4a illustrates the bottom face of an alternative bench top;

Figure 5 illustrates an end view of a bench top;

Figure 6 illustrates a top plan view of a work bench;

Figure 7 illustrates the outside face of a frame side;

Figure 7a illustrates the outside face of an alternative frame side;

Figure 8 illustrates the inside face of a frame side;

Figure 8a illustrates the upper surface of an alternative frame side;

Figure 9 illustrates the outside face of a leg;

Figure 10 illustrates the inside face of a leg;

Figure 1 1 illustrates the outside face of a plate;

Figure 12 illustrates a side view of a plate;

Figure 13 illustrates a plane view of a star lock washer;

Figure 14 illustrates a side view of a star lock washer;

Figure 15 illustrates a perspective view of a star lock washer;

Figure 16 illustrates a cross-section taken through a frame side, a leg and a plate assembly;

Figure 16a illustrates a cross-section taken through a frame side, a leg, and a peg;

Figure 17 illustrates a top view of a fixing;

Figure 18 illustrates a front view of a fixing;

Figure 19 illustrates a side view of a fixing;

Figure 20 illustrates a back-side perspective view of a fixing;

Figure 21 illustrates a cross-section taken through a fixing, a frame side, a leg and a bench top;

Figure 21 a illustrates a cross-section taken through a fixing, a frame side, a leg, a bench top and a peg;

Figure 22 illustrates a lamp accessory;

Figure 23 illustrates an electrical tool accessory;

Figure 24 illustrates an end view of a mini-bench;

Figure 25 illustrates an inside face view of a mini-bench end; Figure 26 illustrates an outside face view of a mini-bench end and two bench tops;

Figure 27 illustrates two mini-work benches;

Figure 28 illustrates an alternative bracing bar assembly;

Figure 29 illustrates an end overview of a mini-work bench using an alternative bracing bar assembly;

Figure 30 illustrates a detail of a peg;

Figure 41 illustrates a work bench with a frame arrangement for a tent;

Figure 42 illustrates a work bench with a tent arrangement; and

Figure 43 shows a work bench with a power tool rest accessory.

In overview embodiments of the invention relate to a work bench for use in construction. The work bench consists of parts which are assembled into a bench. Certain parts of the work bench may be replaced or substituted for other parts providing a work bench that is reconfigurable and suitable for flexible working depending on the use.

In the specification terms such as 'top', 'bottom', 'upper', 'lower', 'side', 'front', 'back', 'inside', 'outside', 'height', 'width' and 'depth' are used. It should be understood that these refer to the components when they are installed in the manner described and depicted herein, and not in any other orientation.

The main components of one embodiment of an assembled work bench 100 comprise two frame sides 20, two bracing bar arrangements 10 or more simply a bracing arrangement 10, four legs 30 and four bench tops 40, 41 . Each of the components will be described in more detail below.

Figures 7 and 8 illustrate a frame side 20 in detail. Figure 7 illustrates the outside face 24 of the frame side 20. Figure 8 illustrates the inside face 25 of the frame side 20. Typically, a frame side 20 is elongate in shape and may be referred to as a "string". The frame sides 20 will usually be made from wood. An upper surface or edge 23 of the frame side 20 provides a flat surface. The lower surface or edge 26 of the frame sides 20 has a pair of notches 21 , 22 positioned proximate to each of the ends of the frame side 20. The first notch 21 is located close to the end of the frame side 20. The second notch 22 is spaced apart from the first notch 21 and may be approximately a fifth of the length of the frame side 20 in from edge. Between the upper surface 23 and the lower edge 26 the ends curve slightly to provide a smooth edge. Also, between the notches 21 , 22 on the lower surface 26, the lower edge 26 curves to provide a smooth edge.

Typically, the dimensions of the frame side 20 will be approximately 1 .9 m between the ends (i.e. length), around 20cm between the upper edge 23 and the lower edge 26 (i.e. width) and approximately 5 cm thick. A handle 27 is positioned preferably at the mid-point of the frame side 20 proximate to the lower edge 26. Bore holes 28 pass through the frame side 20 from the inside face 25 to the outside face 24 near to the ends of the frame side 20. The bore holes 28 are for receiving a part of the bracing bar arrangement 10, when the work bench 100 is assembled. On the inside face 25 of the frame side 20, and surrounding each of the bore holes 28 is a recessed area 29 for receiving a locking mechanism, described in more detail below. Another part of the bracing bar arrangement 10 will rest in one of the two notches 21 , 22 when the bench 100 is assembled. The shape of the lower edge 26 of the frame side 20 assists in directing a part of the bracing bar arrangement 10 to rest in one of the notches 21 , 22.

On the inside face 25 of the frame side 20, recesses 51 in the frame side 20 are provided. The recesses 51 are for receiving fixings 50, described in more detail below. The recesses 51 may be located just below the upper edge 23 of the frame side 20 so that in use the fixings 50 are spaced apart along the length of the frame side 20. At each end of the side frame 20 there is a fixing location which is spaced in from the end.

Figure 3 illustrates a bracing bar arrangement 10 in more detail. The bracing bar arrangement 10 comprises two parallel long bars 1 1 , 12, which are preferably generally cylindrical. Two short bars 13 are connected to and extend between, the parallel long bars 1 1 , 12 and provide struts towards each end between the parallel long bars 1 1 , 12. In addition, the bracing bar arrangement 10 may further comprise facing bars 14 and one or more reinforcement bars 15. The facing bars 14 are of a similar length to the short bars 13 and are located to the outside of the short bars 13, i.e. nearer to a first end 16 and a second end 17 than the middle of the long parallel bars 1 1 , 12. The reinforcement bar 15 is located between the short bars 13 and extends from the first parallel long bar 1 1 to the second parallel long bar 12, thereby providing a diagonal supporting member.

At least the ends of the parallel long bars 1 1 , 12 may be cylindrical and threaded so that a wing nut 2 may be threaded onto the end of the bar 1 1 , 12 and secured. The strut bars 13 and the reinforcing bar 15 may have any suitable cross section. The facing bars 14 typically will have an 'L' or 'T' cross section for providing a flat surface facing towards the ends 16, 17 of the parallel long bars 1 1 , 12. The arrangement 10 may include additional reinforcing bars 15 to provide extra strength and stability to the arrangement 10. For example, two diagonal reinforcing bars 15 arranged in an 'X' may be suitable.

The length of the parallel long bars 1 1 , 12 may be around 1 m. The length of the struts 13 and face bars 14 may be around 18cm. Typically, the bracing bar arrangement 10 is made of metal such as steel and the arrangement will typically be welded together. After fabricating the bracing bar arrangement 10 the arrangement 10 may be dipped to provide a protective layer and good finish. More specifically, the parallel long bars 1 1 , 12 may be 'tie bars', which are well known in the field. The wing nuts 2 may be 'whirley' nuts. Both tie bars and whirley nuts are readily available and are easily adaptable for use with the arrangements described herein.

Figures 9 and 10 illustrate one of the legs 30 of the work bench 100. Figure 9 illustrates the outside perspective of the leg 30. Figure 10 illustrates the inside perspective of the leg. The leg 30 is elongate and tapered between the top end and a foot 33. The leg 30 has two offset bore holes 31 , 32 which pass from the inside surface to the outside surface of the leg 30. The bore holes 31 , 32 are located proximate to the top of the leg 30. The foot 33 of the leg 30 is located at the end opposite the top of the leg 30. The foot 33 may optionally be provided with a cover (not shown in the figures) to protect the foot 33 from damage. Towards the top end of the leg 30, between and surrounding the two bore holes 31 , 32 on the outside face 24 of the leg 30, there is a recess 34, which is preferably generally lozenge-shaped. The recess 34 is for receiving a plate 35 of a hinge mechanism (not shown in figures 9 and 10). Typically, the legs 30 will be made from wood. The dimensions of the legs 30 may be as follows: a length so as to provide an overall height to the work bench 100 of 85cm, the distance between one side of the leg 30 and the other may be around 15 or 20 cm, and a width or depth of the leg 30 may be 5cm. Figures 1 1 and 12 show a plate 35 to be used as part of a hinge mechanism which operates to move the legs 30 between positions when the work bench 100 is assembled. Figure 1 1 shows the outside face of the plate 35. Figure 12 shows a side view of the plate 35. The plate 35 is sized and shaped to fit into the lozenge shaped recess 34 at the top of the leg 30 on the outside face. The thickness of the plate 35 is similar to, or slightly less than, the depth of the recess 34. The plate 35 has two smaller inner holes 36 for fixing the plate 35 to the leg 30, for example, using screws. The smaller holes 36 may have bevelled edges so that the head of a screw may fit within the plate 35. This provides a flat surface to the plate 35 when it is secured in position to the leg 30. Further, the plate 35 has outer holes 37, located towards each end of the plate 35 and of a similar size to the bore holes 31 , 32 which extend through the leg 30. Fixed within the larger holes 37 and extending from the inside surface of the plate 30 are tubes 38, 39. Preferably, the tubes 38, 39 are seamless and without threading. The tubes 38, 39 are large enough in diameter to receive the long parallel steel bars 1 1 , 12 of the bracing arrangement 10. Having a smooth inner surface assists with easy passage of the steel bars 1 1 , 12 through the tubes 38, 39. Further, the tubes 38 is of suitable length to pass through the width of a leg 30 and the width of a frame side 20 and the tube 39 is of suitable length to pass through the width of the leg 30.

Typically, the plate 35 is made of metal and the tubes 38, 39 may be welded to the plate 35. Alternatively the tubes 38, 39 may have an interference fit with the plate 35. When assembled, the tube 39 receives the upper long parallel bar 1 1 of the bracing arrangement 10. On the inside face of the leg 30, and surrounding the bore hole, is a recessed area for receiving a locking device for securing the tube 39 in position. A work bench 100 frame may be assembled by a single worker using two frame sides 20, two bracing bar arrangements 10, four legs 30 and eight wing nuts 2. One method of assembling the frame is described below.

To start with, a plate 35 and tube 38, 39 assembly is inserted through the bore holes 31 , 32 of each leg 30 from the outside of the leg 30 and through the leg 30. Once the plate and tube assembly is inserted with the plate 35 in the correct orientation, the tube 39 for receiving the upper long parallel bar 1 1 of the bracing arrangement 10 will extend from the inside face of the leg 30. The lower tube 38 may be secured in the lower bore hole 32 of the leg using a locking mechanism, described in more detail below. The upper tube 39 is then inserted through the bore hole 28 of the frame side 20 and secured using a locking mechanism. In the correct orientation, the leg 30 will be able to pivot about the upper bore hole 28 between the storage/transport position and the working position. This assembly process is repeated for each end of two frame sides 20, which will form the basis of a work bench 100 with two strings or side frames 20 and four legs 30.

In order to secure the tube 39 in position, the ends are fitted first with a washer 4 (which may be formed from nylon) and then with a star lock washer 5 of the type shown in figures 13, 14 and 15. The star lock washer 5 comprises a disk of material with the centre removed. Around the centre edge there are a series of notches to provide segments. The segments are turned up to assist with inserting the washer 5. The edge of the washer 5 is turned up to provide the washer 5 with additional strength. Typically the removed centre is slightly smaller than the tube or bolt to be secured. As the washer 5 is pushed over the end of the tube, the segments deform to have an interference fit around the tube. The washer 5 is difficult to remove without destruction of the washer 5 because of the up-turned segments. Therefore, the washer 5 may be used for locking or securing the end of a tube 39. In the assembly of the work bench 100, star lock washers 5 are used to secure the plate and tube arrangement of the hinge mechanism to the legs 30 and frame sides 20.

Figure 16 shows a cross section taken through a leg 30 and frame side 20 when fitted together using a nylon washer 4 and a star lock washer 5. Once the legs 30 and frame sides 20 are assembled together in this way they will be permanently fixed to each other. The legs/frame side subassembly may then be used to assemble and disassemble a work bench 100 of the type shown in figures 1 , 2 and 6, together with two bracing bar assemblies 10 and one or more bench tops 40, 41 . To assemble a complete work bench frame, opposite ends 16, 17 of two bracing bar assemblies 10 are inserted through the reinforced bore holes of two legs/frame side subassemblies at respective ends. The upper long parallel bar 1 1 is inserted through the upper bore hole 28, 31 of each leg and frame side 20, and the lower long parallel bar 12 is inserted through the lower bore hole 32 of each leg. As noted above, the bore holes 31 , 32 are reinforced with the tubes 38, 39 and allow easy passage of the long parallel bars 1 1 , 12.

Once fully inserted, the inside faces 25 of the frame sides 20 will abut the face bars 14 of the bracing bar assembly 10. The face bars 14 thereby determine the distance between the facing frame sides 20, and hence the overall width of the work bench 100. A short length of the long parallel bars 1 1 , 12 may extend from the outside face 24 of the legs 30. The bracing bar assembly 10 is then secured with wing nuts 2 or the like threaded onto the end of the long parallel bars 1 1 , 12 and tightened to abut the legs 30. At this stage of assembly, the frame of the work bench 100 is completed. The frame includes the frame sides 20, bracing bar arrangements 10 and the legs 30. An upper frame could be considered as the frame sides 20 and the bracing bar arrangements 10.

Accordingly, the distance between the facing bars 14 and the end of the parallel long bars 1 1 , 12 is at least the width of the frame side 20 and a leg 30 combined. Preferably, the distance is greater than the width of the frame side 20 and a leg 30 combined so that a wing nut 2, or other securing fastener, may be threaded onto the end of the bar 1 1 , 12 easily. When the frame is assembled, the legs 30 may freely pivot on the upper long parallel bar 1 1 between the storage/transport position and the working position. The movement of the legs is limited by the notches 21 , 22 on the lower edge/surface 26 of the frame side 20.

The lower of the long parallel bars 12 rests in one of the two notches 21 , 22. The notch 22 is spaced in from the end of the frame side 20 and is used when the legs 30 are folded in. The notch 21 located near the end of the frame side 20 is used when in a working configuration. The notches 21 effectively lock the bar 12 in position when a weight is placed on top of the work bench 100.

Furthermore, the exact position of the bar 12 may vary slightly to absorb any variation of the surface which the work bench 100 is placed on and therefore provide better stability to the work bench 100.

Using the plate 35 provides additional strength and support to the frame. The plate 35 provides a greater area to take the weight of objects on the work bench 100 as well as the weight of the bench 100, itself. Thus, the plate assembly reduces the pressure on the hinge mechanism.

Figures 4 and 5 illustrate the bench tops 40, 41 in more detail. Bench tops may also be referred to as "cradles". Figure 4 provides a view of the underside or bottom of a base 42, which in this example has an T shape.

At each end of the horizontal part of the T shape there is located, proximate to the edge, a handle 46. Inside the handle 46 at each end there is a groove 47 that extends across the width of the base 42. The width of the groove 47 is suitable for receiving the upper edge 23 of a frame side 20 so that, when assembled, the bench top 40, 41 may be properly located with respect to a pair of frame sides 20. Inside of the groove 47 is a hole 48 for securing the bench top 40, 41 to the work bench 100 frame using a fixing 50. If the bench tops 40, 41 were to be secured directly to the upper surface 23 of the frame side 20 (without using a fixing 50), then this hole 48 would be located in the groove 47. As shown in figure 5, sacrificial beams 43 are attached to the base 42. The beams 43 are located on the upper surface of the base 42 and along opposite long edges 44 of the base 42, perpendicular to the grooves 47 and bridging the cut-out sections of the T shape.

Typically the bench tops 40, 41 will be made from wood. Preferably the base 42 is made from sheet plywood and the sacrificial beams are made 5cm by 7.5cm beams. The length of the bench tops 40, 41 corresponds to the overall width of the workbench 100, and is therefore complimentary to the proportions of the bracing bar arrangement 10. For example, the length of the bench tops may be 50cm between the grooves 47. The width of the bench tops 40, 41 may vary. Preferably at least two bench tops 40, 41 fit on the frame. More preferably, at least four bench tops 40, 41 fit on the frame. It will be

understood that bench tops 40, 41 may be made to allow use of any number of bench tops 40, 41 with a corresponding frame. As shown in figure 1 , 2 and 6, the end bench tops 41 are slightly narrower width than the middle table tops 40. Typically, the bench tops 40 are 31 cm wide while the bench tops 41 are approximately 24 cm wide.

To complete the work bench 100 assembly, bench tops 40, 41 are positioned on the upper surfaces 23 of the frame sides 20, with each bench top 40, 41 extending across the gap between the two frame sides 20. The bench tops 40, 41 are secured in position, for example, using bolts 6 (as shown in figure 1) or screws which pass through the bench top base 42 and go into fixings 50 on the inside face 25 of the frame side 20. The bolts 6 pass through the bench top 40, 41 into a fixing arrangement 50. The end bench tops 41 are preferably located so that the sacrificial beams 43 are exactly or approximately in-line with the edge of the frame sides 20 and provide a smooth edge to the bench 100. The middle bench tops 40 are preferably spaced evenly along the length of the frame side 20. In the embodiments shown, spaces are present between adjacent bench tops 40, 41 . However, in other embodiments the bench tops 40, 41 may be placed close together, or adjacent/abutted against one another.

Figure 1 illustrates an overview of a work bench 100. The work bench 100 comprises two bracing bar arrangements 10 located between two frame sides 20. On the outside of the frame sides 20, legs 30 are located extending downwardly to rest on a floor or other surface. Each end of each of the bracing bar arrangements 10 passes through one of the frame sides 20 and one of the legs 30 to connect them all together. As above, the frame is secured using wing nuts 2 threaded onto the free ends of the bracing bar arrangements 10. Thus, the bracing bar arrangements 10, frame sides 20 and legs 30 provide a sturdy, and generally rectangular frame for the work bench 100.

In figure 1 the work bench 100 is shown with four bench tops 40, 41 not yet attached. Fixing arrangements 50 are located on the inside face of the frame sides 20 and at suitable intervals for securing the bench tops 40, 41 . In the position shown, the legs 30 are angled slightly outwards or splayed so that they provide a stable base to the work bench 100. Each of the lower bar 12 ends of the bracing bar arrangement 10 rests in a first notch 21 located near the end of the frame side 20. The notches 21 secure the legs 30 in the work or table position.

Figure 2 illustrates a side view of a work bench 100 with the bench tops 40, 41 resting on the upper surface 23 of the frame side 20 and the legs 30 in the table position. In this figure, it may be seen that the base 42 of the bench tops 40, 41 rests flat on the frame side's upper surface 23. The sacrificial beams 43 extend away from the upper surface 23 of the frame side 20. Figure 6 illustrates a plan view of the upper surface of the work bench 100. Features which would not be visible from directly above the bench 100 are shown with dotted lines. As can be seen, the position of the bench tops 40, 41 on the upper surface 23 of the frame side 20, corresponds with the position of the groove 47 on the lower surface of the bench top base 42. The hole 48 (only shown on one of the bench tops 40, 41) is located to the inside of the frame side 20 for securing the bench top 40, 41 using a fixing 50. The handles 46 in the bench tops 40, 41 are located outside of the frame side 20. The position of the legs 30 may be seen in dotted lines to the outside of the frame side 20 at each end. The handles 46 of the bench tops 40, 41 are conveniently located outside the legs 30. As indicated above, the bench tops 41 located at the ends of the frame side 20 are slightly narrower than the bench tops 40 located in the middle of the bench 100. It can be seen that the spaced-apart sacrificial beams 43 of the bench tops 40, 41 provide a series of work surfaces and that a user may rest a work piece across these beams 43 to carry out a procedure on the work piece 1 1 .

As mentioned elsewhere in the description, the work bench 100 may comprise one or more fixings 50 for securing the bench tops 40, 41 to the frame side 20 top edge 23. Details of the fixing 50 are illustrated in figures 17 to 20.

Figure 17 illustrates a top view of a fixing 50. Figure 18 illustrates a front view of a fixing 50. Figure 19 illustrates a side view of a fixing 50. Figure 20 illustrates a back-side perspective view of a fixing 50.

The main body 52 of the fixing has an 'F'-shape, with a front portion 56 extending away from the back of the main body 52. On the back or outer side (when it is installed relative to a work bench 100) of the F-shaped body 52 is a plate 53. The plate 53 extends below the bottom edge 54 of the main body 52 and beyond the side edges 55 of the main body 52. However, the top of the plate 53 is below the top of the main body 52, therefore, the plate 53 appears to be offset from the main body 52 of the fixing 50.

Through the front portion 56 of the main body, a main fixing hole 57 extends from the top face. This hole 57 is for receiving a screw 2 or bolt 6, or other fixture, to secure another element above the fixture 50. In use with a work bench 100, as described herein, when positioned in the recess 52, the hole 57 aligns with the screw hole 48 of a bench top 40 when placed on the upper surface 23 of two frame sides 20. Perpendicular to the hole 57, passing from the front of the fixing 50 to the back of the fixing 50 and plate 53, are three secondary fixing holes 58. These secondary fixing holes 58 are for securing the fixing 50 in position, and may be used with screws 3, nails or other suitable means. In the example shown, the secondary fixing holes 58 run generally perpendicular to the main fixing hole 57.

In the front portion 56 of the fixing 50, near the top of the fixing 50, there is a first opening 59. The opening 59 provides access to one of the secondary fixing holes 58. Below the first opening 59, there is a second opening 60 into which a threaded nut 61 may be inserted. The second opening 60 and the nut 61 are shaped so that once inserted, the nut 61 does not turn nor may it be removed. In alternative arrangement, the main fixing hole 57 may be provided with internal threading and in these embodiments the nut 61 is not required. The remaining two secondary fixing holes 58 are located in the bottom portion of the fixing arrangement main body. Thus, the fixing 50 is used to secure parts in both vertical and horizontal directions, vertically through the main fixing hole 57 and horizontally through the plate 53. In other words, the fixing 50 secures parts in two orthogonal directions.

The fixing arrangement 50 may be made from injection moulded plastics. Figure 21 illustrates a fixing 50 in use with a work bench 100. The figure illustrates a cross-section taken through a fixing 50, a frame side 20, a leg 30 and a bench top 40, 41 . As mentioned above, the frame side 20 may be provided with a recess 51 on the inside surface 25. The recess 51 is suitable for receiving the back plate 53 of the fixing 50. The recess 51 is of similar depth and shape as the back plate 53 so that the fixing 50 fits neatly into the recess 51 . The recess 51 is located proximate but spaced apart from the upper surface 23 of the frame side 20. The fixing 50 is secured to the frame side 20 in position in the recess 51 with three screws 3 as a securing means, which pass through the secondary fixing holes 58 and extend into the frame side 20. Thus, the frame side 20 is secured horizontally to the fixing 50. When a work bench 100 is fully assembled, a bench top 40, 41 rests on the upper surface 23 of the frame side 20 and the bench top 40, 41 is secured to the work bench 100 with a bolt 6 passing through the hole 48 and inserted into the top of the main fixing hole 57. The bolt 6 is secured in position by the nut 61 , or screw threads provided on the inner surface of the hole 57, to draw the fixing towards the bench top 40, 41 . Thus , the bench top 40, 41 are secured vertically to the fixing 50. Accordingly, the fixing 50 is used to fix the frame side 20 firmly to the bench top 40, 41 orthogonally. The fixing 50 may be used to removably secure the bench tops 40, 41 to the work bench 100.

The position of the fixing 50 relative to the frame side 20 allows the bench tops 40, 41 to be securely and stably fastened to the work bench frame. The plate 53 assists in distributing the pressure put on the joint and therefore in keeping the fixing 50 in position. Furthermore, the bench tops 40, 41 is secured in line with the main force that will be exerted on the fixing 50 while the fixing 50 is secured perpendicular to this force. If the combination of the recess 51 and back plate 53 was not provided, the fixing 50 would be attached to the frame side 20 only by the screws passing through the secondary fixing holes 58. In this case, upward or downward forces on the bolt 6 passing through the main fixing hole 57 would place a great strain on these screws, and the screws may be pulled out of the side frame 20. However, because the back plate 53 fits into the recess 51 , upward or downward forces cause the upper or lower edge (as appropriate) of the back plate 53 to be driven into the upper or lower shoulder formed by the recess 51 . These forces are therefore directed onto the frame side 20 and do not place excessive stress on the screws that pass through the secondary fixing holes 58. It will be understood that lateral forces acting as the fixing 50 may likewise be transferred to the frame side 20 by the side edges of the plate 53 abutting against the side walls of the recess 51 . Various accessories and subassemblies may be fitted to the assembled work bench 100 to allow for personalised and flexible use of the work bench 100. In addition, the work bench 100 may be provided with an electrical power attachment point. The electrical power attachment point would be preferably located on the inside of one of the legs 30 to avoid trip hazards. The single attachment point could then be used to provide electricity points at various locations on the bench 100, for powering tools and other accessories. Thus, the work bench 100 would be self-contained together with the tools that may be needed. Two examples of such accessories are illustrated in figures 22 and 23.

Figure 22 illustrates a lamp 70 to be used with the work bench 100. The lamp 70 may be attached to the work bench 100 using a metal lamp plate 71 , which could be similar to the more basic plate 35 used for attaching the legs 30 to the work bench 100. The lamp plate 71 could be modified from the more basic plate 35 or could be a separate lamp plate 71 that is attached to the work bench 100 at a different location. Attached to the lamp plate 71 is a stand for supporting the lamp 70. The height of the stand may be adjustable. The lamp head 72 is located at the top of the stand. Conveniently, located on the stand there is switch 73 for operating the lamp 70. The lamp head 72 is arranged so that it may be swivelled or tilted so that light may be directed to the work area.

Figure 23 illustrates an accessory 80 for use with a power tool. Similarly to the lamp 70, the accessory 80 may be attached to the work bench 100 using a metal plate 81. The plate 81 for attaching the accessory 80 could be modified from the more basic plate 35 arrangement described above. The accessory plate 81 could replace more basic plate 35 or the accessory plate 81 could be attached in another position to the work bench 100 and used in addition to the more basic plate 35. The accessory 80 comprises two arms 82, 83. The first arm 82 extends from the plate 81. The second arm 83, extends from the first arm 82. Both arms 82, 83 may be manoeuvrably attached so that they may be repositioned in convenient positions. The first arm 82 may have an electrical socket 84 for plugging in a power tool. The first arm 82 may also have a dust extraction inlet 85 built into the end of the arm 82 for use when working with tools that create dust. The second arm 83 may comprise a surface and table clamp 86 for securing a power tool.

In use, a worker may use a sheet of plywood as a table top. The plywood would be placed on top of the bench tops 40, 41 to provide a surface for working on. Often the work bench 100, will be used for cutting shapes of plywood and other materials used in construction. The worker may use a tool that is mounted on the work bench 100, or another tool. The tool can be used to cut through the work piece, positioned on the bench tops 40, 41 . Using the work bench 100, in this way, the worker may cut through or otherwise damage the sacrificial beams 43 of the bench tops 40, 41 . This destructive use of the work bench 100 is intended. The bench tops 40, 41 may readily be replaced with replacement bench tops 40, 41 . Furthermore, used or damaged bench tops 40, 41 may be reconditioned for future use by replacing the sacrificial beams 43. Thus, the worker may easily carry out tasks using the work bench 100, without having to worry about causing damage to the upper surface of the work bench 100. When the work bench 100, is not in use, the bench 100 may be left assembled. All items resting on the work bench 100, are removed. A worker may easily move the legs 30 from the work position to the transport/storage position. The bench 100 is lifted or turned on to a side so that the legs 30 may be pivoted about the upper long parallel bar 1 1 and folded in, parallel with the frame side 20. Conveniently, the relative lengths of the legs 30 and the frame side 20 are such that the legs 30 do not quite meet at the centre of the frame side 20 when folded in, and leave the handle 27 un-obtruded so that it may be used to carry the collapsed work bench 100. With the work bench 100 in the

transport/storage position, a number of work benches 100 may be neatly stacked and stored when not in use. When the frame sides 20 are turned upside down, the tubes 38 rests in notches 22. Thus, the legs 30 are held in a secure position when the frame is carried by the central handle 27.

The fully assembled work bench 100 or without the bench tops 40, 41 may be folded and leant against a wall or stacked without causing obstruction on the site. Furthermore, as the bench 100 is lightweight and with handles in the frame, it may easily be moved from one place to another. As the work bench 100 may be stored or disassembled and it is relatively compact, it is easily transportable between sites in a small vehicle.

Alternatively to manual handling of the work bench 100, the work bench 100 may be manoeuvred using a crane. The crane or crane chains may be attached to one of the bracing bar arrangements 10, accessed between the end bench top 41 and the penultimate bench top 40 or alternatively from one end of the work bench 100 between the legs 30. The work bench 100 may thus be transported without the need to de-assemble the bench 100 or even collapse the work bench 100 into the storage/transport position from the work position. Although, it may be most secure to attach crane chains to the bracing arrangement 10 with the legs 30 folded and from the underside. A crane hoist or chains may be attached to any part comprising a robust elongate element where at least part of the element is unobstructed to provide access for the crane.

In one variation, the bracing bar arrangements 10 and bench tops 41 already described may be used with a 'mini-bench' end 90 or more simply a bench end 90 to make a smaller work bench 200.

Figure 24 illustrates an end view of a mini-bench 200. A single bracing bar arrangement 10, similar to those described above, is used for each mini-bench 200. Bench ends 90 replace the frame sides and legs of the full-sized work bench 100.

Figure 25 illustrates an inside face view of a mini-bench end 90. Figure 26 illustrates an outside face view of a mini-bench end 90 and two bench tops 41 . The bench ends 90 are shaped to have feet 91 , which are used to replace the separate legs of the frame side/leg subassembly of the larger work bench 100. The top edge of the bench end provides a substitute for the upper surface of the frame side 20. A handle 92 is provided near the top edge of the bench ends 90. Preferably the handle 92 takes the form of a cut-out. Proximate to the top edge, the inside face of the mini-bench end 90 further comprises spaced apart recesses 51 for receiving fixings 50. In the middle of the bench ends 90 are two bore holes 93 for receiving the ends 16, 17 of a bracing bar arrangement 10. On the outside of the bench ends 90, there are no recesses for receiving fixings, however, there may be a recess for receiving a plate preferably having short tubes attached. In this arrangement, the tubes attached to the plate would be of similar length to the thickness of the bench ends 90. The bench ends 90 would typically be made from wood, and may preferably have a height of approximately 88cm and a width of approximately 60 cm.

To assemble a mini-bench 200, two bench ends 90, a bracing bar arrangement 10 and two of the interchangeable bench tops 41 may be used. In the example illustrated, the bench tops are similar to the narrower bench tops 41 used for the full sized work bench 100.

Of course, the skilled reader will understand that a larger work area may be created by positioning two more work benches 100, 200 close to each other.

In one variation, the side frames 20 may be provided with a series of pegs 8 or other protrusions protruding from the upper surface 23. A detail of a peg 8 is illustrated in figure 30 and the variation of the bench 100 (and various components of the bench 100) comprising the peg 8 are illustrated in figures 1 a, 4a, 7a, 8a, 16a and 21 a.

As may be seen in figure 30, the peg 8 generally has a shape of an elongate mushroom. The stem has bands of serrations around the circumference and the head of the peg 8 is dome shaped. The pegs 8 are located in spaced apart locations along the upper surface 23 of the side frame 20. The stem of the peg 8 is inserted into a drill hole in the upper surface 23 of the side frame 20, so that the stem is within the side frame 20 and the head of the peg 8 protrudes from the upper surface 23. The serration bands around the stem of the peg 8 help to ensure that the peg 8 is secured within the side frame 20. Figure 7a illustrates a side view of a side frame 20 with protruding pegs 8 and figure 8a illustrates a top view of the upper surface of a side frame 20. In both figures 7a and 8a, legs 30 are attached to the side frame 20. Figures 16a and 21 a illustrate cross section views of the side frame 20 with the peg 8 and various other components (as described elsewhere in this specification) of the work bench 100. In figure 21 a, it is coincidental that the screw 3 extends into the peg 8. Although the fixing 50 and peg 8 could be aligned, they do not need to be. In use the pegs 8 are used to locate the bench tops 40, 41 . Accordingly, for use in the variation, the bench tops 40, 41 are modified to comprise an additional hole 49 for receiving the head of a peg 8, as illustrated in figure 4a. When the bench tops 40, 41 are positioned on the upper frame of the work bench 100, the peg heads are located in the additional holes 49. An overview of the work bench 100 using this variation is illustrated in figure 1 a.

In an alternative arrangement, the bench tops 40, 41 could be provided with pegs 8 which are secured in holes in the side frames 20. Figure 28 illustrates an alternative bracing bar arrangement 1 10. The alternative bracing bar arrangement 1 10 may be used in place of the bracing bar arrangement 10 with the work benches 100, 200 described herein.

The bracing bar arrangement 1 10 comprises two parallel long bars 1 1 1 , 1 12. The bracing bar arrangement 1 10 further comprises facing bars 1 14 which extend between, and are fixed to the long bars 1 1 1 , 1 12. The facing bars 1 14 are located near to the first end 1 16 and the second end 1 17 respectively of the long parallel bars 1 1 1 , 1 12. Similarly to the bracing bar arrangement 10 described above, the parallel long bars 1 1 1 , 1 12 of the bracing bar arrangement 1 10 may be cylindrical and threaded so that a nut 2 may be threaded onto the end of the bar 1 1 1 , 1 12 and secured. The facing bars 1 14 typically will have an 'L' or 'T' cross section for providing a flat surface facing towards the ends 1 16, 1 17 of the parallel long bars 1 1 1 ,1 12. For the alternative bracing bar arrangement 1 10, located between the facing bars 1 14 is a clamp arrangement 1 18, 1 19, 102. The clamp arrangement comprises a fixed bar 1 18 extending between the parallel long bars 1 1 1 , 1 12. A moveable plate 1 19 may slide along the parallel long bars 1 1 1 , 1 12 between the fixed bar 1 19 and one of the facing bars 1 14. Two wing nuts 102 or the like, one on each of the parallel bars 1 1 1 , 1 12 are located between the moveable plate 1 19 and the face bar 1 14. As the parallel long bars 1 1 1 , 1 12 are threaded the wing nuts 102 may be moved along the parallel long bars 1 1 1 , 1 12 between the moveable plate 1 19 and the face bar 1 14. Thus, if an object is placed between the fixed bar 1 18 and the moveable plate 1 19, the wing nuts 102 may be tightened against the moveable plate 1 19, until the object is clamped between the fixed bar 1 18 and the moveable plate 1 19.

Where the bracing bar arrangement 1 10 is made of metal such as steel, the arrangement will typically be welded together. After fabricating the bracing bar arrangement 1 10 the arrangement 1 10 may be dipped to provide a protective layer and good finish.

The distance between the facing bars 1 14 and the end of the parallel long bars 1 1 1 , 1 12 is at least the thickness of the end 90. Preferably, the distance is greater that thickness of the end 90 so that a wing nut 2, or other securing fastener, may be threaded onto each of the bar 1 1 1 , 1 12 ends.

Figure 29 illustrates an end view of a work bench 200 using the alternative arrangement of the bracing bar arrangement 1 10. This arrangement may be used with either the full sized bench 100 or the mini-bench 200, although the mini-bench 200 is shown in this illustration. The arrangement illustrated in figure 29, may preferably be used for each of the mini-benches 200 illustrated in figure 27. In figure 29, a beam 7 is placed between the fixed bar 1 18 and the moveable plate 1 19. The plate 1 19 is not yet secured/clamped against the beam 7 by tightening the wing nuts 102. Using the alternative bracing bar arrangement 1 10, work benches 100, 200 may be secured to adjacent work benches 100, 200 by clamping a beam 7 between them, as shown in the example of two mini-work benches 200 illustrated in figure 27.

In the arrangement illustrated in figure 27, one end of a beam 7 is clamped in the bracing arrangement 1 10 of the first mini-bench 200 and the opposite end of the beam 7 is clamped in the bracing arrangement 1 10 of the second mini- bench 200. Thus, used together in this way, the two mini-benches 200 provide a larger and stable work surface. Using a beam 7 clamped between two work benches 200 assists in stabilising the benches 200 so that they are safe to use and provide a stable work surface. Of course, if more than one beam 7 was used, a number of benches 100, 200 may be joined together in a 'daisy chain' arrangement. Thus, the benches 100, 200 are adaptable in work area to suit a particular job. In addition, the work benches 100, 200 could be 'daisy chained' with other types of work bench used for carrying out particular types of work.

The specific proportions and size of the work benches described herein are not crucial. However, it will be understood that the dimensions should be suitable for a worker to comfortably use the work bench.

In a variation of use, the fixing 50 may be used for providing a vertical suspension point, for example for providing a temporary ceiling. In another variation, the work bench 100 may be used as a platform to stand on. The work bench 100 would be provided with a work surface, such as a sheet of plywood and could be fitted with a handrail. This would allow work from an elevated position and without danger of failing. In a variation, the work bench 100 may be provided with a dedicated work surface to be fixed to the bench tops 40, 41 or alternatively fixed to the upper surface 23 of the stings 20. Figure 41 illustrates a work bench 100 with a frame arrangement for a tent and figure 42 illustrates a work bench 100 with a tent arrangement which surrounds the work area. The tent frame 400 is attached to the work bench 100, to one of the side frames 20. The securement point 401 of the tent frame 400 is fixed to the work bench 100 by clamping between the two legs 30 on one side and the corresponding wing nuts 2. The tent frame 400 extends away from the work bench 100 a short distance, and then vertically to a height which will provide a suitable space above the work surface. The tent frame 400 then extends substantially horizontally above the work surface to provide a structure for a canopy 402. The horizontal portion 402 of the tent frame 400 is supported with lockable hinged bracing bars 403 on each side. Thus, the horizontal portion 402 of the tent frame 400 may be folded down to be substantially vertical when not in use. Thus the tent frame 400 can be left attached to the work bench 100 and quickly erected when needed. The tent frame 400 is relatively light weight.

A fire-proof or fire-retardant sheet 410 may be attached to the work bench 100 and frame 400 using Velcro™ tabs 41 1 or other suitable means such as popper buttons or ties. The fire-retardant sheet 410 extends from the opposite side frame 20 on the underside of the work bench 100, between the legs 30, around and over the stop of the tent frame 400. Side panels 412 are attached to the sheet 410 and suspended from the canopy structure 402 to hang down from the canopy and cover the ends of the work bench 100. The bottom of the side panels 412 may have pleats or skirts 413 to allow the sheet 410 to drape over the ends of the work bench 100 and cover any work pieces that extend beyond the end of the work surface. Thus, the sheet 410 forms a tent over the work bench 100 with one side open 414 to allow access to the work surface.

The fire-retardant tent may be useful for activities such as welding and metal cutting. The portion of the fire-retardant sheet 410 extending under the work surface may catch any debris from the working activity and help to contain the debris. The skirts 413 also help to retain debris. Thus, the fire-retardant tent is used to contain activities and improve safety where there is a risk of fire or if there is a risk that debris will be inadvertently thrown from the work surface.

Embodiments of the invention provide a work bench as described above, further comprising a fire-retardant sheet (which may be provided in one piece, or as two or more co-operating pieces) for use over a support frame which is attached (preferably removably attached) to the work bench, wherein the support frame provides a structure for supporting the fire-retardant sheet to provide a work space which is partially enclosed (and may be substantially enclosed) and which is positioned over at least a part of the work bench. The fire-retardant sheet may be attached to the work bench and frame with Velcro

TM

Figure 43 shows a work bench 100 with a power tool rest accessory 450. The rest accessory 450 attaches to the inside of the work bench 100 between the two sides and at one end. The rest accessory 450 is secured to either the bracing arrangement 10 or to the inside of the side frames 20. The rest accessory 450 slops downward and away from the end of the work bench 100 and provides a substantially horizontal platform for resting tools, such as power tools and other items. The height of the platform is below the work surface of the work bench 100. Thus, tools and other items may be safely stored off the ground but away from the work surface when not in use.

Embodiments of the invention provide a work bench as described

above.further comprising a rest accessory attached (preferably removably attached) to the bracing arrangement and providing a substantially horizontal platform raised above ground level and to the side of the work bench.

Preferably the platform is at a level which is lower than the working surface of the bench. Holding receptacles for tools or the like may be provided on or near the platform, as part of the rest accessory.

When used in this specification and claims, the terms "comprises" and

"comprising" and variations thereof mean that the specified features, steps or integers are included. The terms are not to be interpreted to exclude the presence of other features, steps or components.

The features disclosed in the foregoing description, or the following claims, or the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for attaining the disclosed result, as appropriate, may, separately, or in any combination of such features, be utilised for realising the invention in diverse forms thereof.

The following description relates to another aspect of the invention. The previous references to the figures and reference numerals do not apply to the subsequent description.

There are currently no purpose designed work benches for use by steel workers on a construction site, which permit for the lacing of steel bar cages and meshes. In current practice, the worker sets up an ad hoc bench to carry out work on. Ad hoc benches do not adhere to health and safety requirements of modern construction sites and may pose a danger to workers on site. For example, when fabricating the steel frames for filing, intense pressure is applied by the steel worker to pull the steel coils along the frame. When the coil is in the correct position, the steel worker fixes tying wiring to the frame. Due to the intense pressures applied, an ad hoc bench is likely to collapse or be unstable. There exists a need for a purpose designed steel worker's bench.

Summary

Aspects of the invention are set out in the accompanying claims. One aspect of the invention provides a work bench subassembly comprising: a bracing arrangement presenting an upper support surface on which a workpiece may rest and a clamping mechanism beneath the upper support surface, and two bench bases wherein the bench bases are removably attachable to the bracing arrangement at respective opposite ends thereof, and when the bench bases are attached to the bracing arrangement, the clamping mechanism is located between the two bench bases.

The clamping mechanism may be suitable for receiving the end of at least one beam. An end of each of the beam(s) may be secured by the clamping mechanism. Another aspect of the invention provides a work bench assembly: comprising at least two work bench subassemblies that may be joined by at least one beam. Thus, the work bench provides a light weight, stable, portable and easy to assemble platform with the specific purpose for use by a steel worker in constructing metal cages and meshes. The work bench allows a steel worker to 'lace up' steel cages on site in a controlled manner. Of course, the work bench is suitable for other uses. In particular, where a stable working platform or surface is required which remains stable even when subjected to high forces. Furthermore, the work bench may comply with health and safety standards.

The beam may be any sturdy and stiff elongate element. Thus, only the parts of the subassemblies need be transported to site as a suitable beam may be readily found on site and used temporally while needed. As the parts of the subassemblies are relatively small compared with a fully assembled work bench, they are easily transportable in small vehicles. Furthermore, as a large work bench is assembled from smaller parts, it is easily assembled by a single person and in an ad hoc way that is adaptable to the use and as the workpiece grows. The bench bases may have a handle so that they are easier to carry.

At least a part of the bracing arrangement may comprise bars which are threaded. The parts of the subassembly may be secured together using wing nuts threaded on the ends of the bars, which are readily available and easy to use. Further, the clamping mechanism may also be used with wing nuts.

As part of the clamping mechanism is moveable, it may receive more than one beam end. Alternatively, two clamping mechanism may be provided each for receiving ends of separate beams. Thus, multiple subassemblies may be used to make a much larger work bench. The subassemblies would be 'daisy chained' together using beams between each respective pair of subassemblies.

To further increase the stability of an assembled work bench, two upright beams attachable to the work bench subassembly at opposite ends of the bracing arrangement may be used with a removable cross bar extending between each of the two upright beams above the support surface to provide secondary support between the two upright beams. This makes the subassembly more stable.

Each of the upright beams may have a number of corresponding vertically spaced apart holes for receiving opposite ends of the cross bar. Thus, the cross bar may be readily removed and replaced at a different height. Accordingly, when the steel worker begins work, the cross bar will typically be located in one of the lower pairs of holes. As the work piece becomes larger and extends in a vertical direction, the worker may remove the cross bar and replace it using a pair of holes that are a greater distance above the work surface. Thus, allowing more space of the workpiece. When the workpiece is completed, the worker may remove the cross bar and disassemble the work bench on one side. This provides access from above and to the side of the workpiece. Alternatively, the worker may decide to use the cross bar as the work surface. In which case, the worker may start with the cross bar at a higher pair of holes and move the cross bar down as the workpiece becomes larger. The workpiece may be supported by a crane or another means as the cross bar is lowered. The assembled workpiece may then be lifted away from the work bench by a crane or by hand, ready to use. As the work bench is assembled on site, it may be assembled close to where the workpiece is needed. After completing a work piece the work bench may be relocated readily. Another aspect of the invention provides a method of using a work bench comprising the steps of: a. assembling at least two work bench subassemblies; b. joining the subassemblies into a work bench by clamping at least one beam between a pair of subassemblies; c. constructing a workpiece on the support surface provided by the bracing arrangement or the cross bar; d. on completion of the workpiece, removing one of the upright beams from each of the subassemblies on the same respective side; and e. removing the workpiece from the work bench. Description of Invention

In order that the present invention may be more readily understood, embodiments thereof will now be described, by way of example, with reference to the accompanied drawings, in which:

Figure 31 illustrates a steel workers bench arrangement;

Figure 32 illustrates a bracing bar arrangement;

Figure 33 illustrates the inside face of a base;

Figure 34 illustrates the outside face of a base;

Figure 35 illustrates the outside face of an upright beam;

Figure 36 illustrates the inside face of an upright beam;

Figure 37 illustrates two alternative cross bars;

Figure 38 illustrates an end view of a steel workers bench arrangement;

Figure 39 illustrates a quick release of a steel workers bench arrangement; and Figure 40 illustrates a steel workers bench arrangement in use with a workpiece.

In the specification terms such as 'top', 'bottom', 'upper', 'lower', 'side', 'front', 'back', 'inside', 'outside', 'height', 'width' and 'depth' are used. It should be understood that these refer to the components when they are installed in the manner described and depicted herein, and not in any other orientation. In overview, a steel worker's bench 300 comprises two work bench subassemblies connected by a beam 7. Each subassembly comprises a bracing bar arrangement 110 or more simply a bracing arrangement 110 with a clamping mechanism, two bench bases 310, and two upright beams 330 which provide secondary support for improved stability of the steel workers bench 300.

Figure 32 illustrates a bracing bar arrangement 110. The bracing bar arrangement 110 may sometimes be known as the bracing bar arrangement for a steel worker's bench. The bracing bar arrangement 110 comprises two parallel long bars 111, 112. The bracing bar arrangement 110 further comprises two facing bars 114. The facing bars 114 are located near to the first end 116 and the second end 117 of the long parallel bars 111, 112, and extend between, and are connected to, the long parallel bars 111, 112.

The parallel long bars 111, 112 may be cylindrical and threaded so that a wing nut may be threaded onto the end of the bar and secured. The facing bars 114 typically will have an 'L' or 'T' cross section for providing a flat surface facing towards the ends 116, 117 of the parallel long bars. Located between the facing bars 114 is a clamp arrangement 118, 119, 102.

The clamp arrangement comprises a fixed bar 118 extending between the parallel long bars 111, 112. A moveable plate 119 may slide along the parallel long bars 111, 112 between the fixed bar 119 and one of the facing bars 114. Two wing nuts 102, one on each of the parallel bars 111, 112 are located between the moveable plate 119 and the face bar 114. As the parallel long bars 111, 112 are threaded the wing nuts 102 may be moved along the parallel long bars 111, 112 between the moveable plate 119 and the face bar 114. Thus, if an object (such as a wooden beam) is placed between the fixed bar 118 and the moveable plate 119, the wing nuts 102 may be tightened against the moveable plate 1 19, until the object is clamped between the fixed bar 1 18 and the moveable plate 1 19.

Where the bracing bar arrangement 1 10 is made of metal such as steel, the arrangement will typically be welded together. After fabricating the bracing bar arrangement 1 10 the arrangement 1 10 may be dipped to provide a protective layer and good finish.

Typically, the parallel long bars 1 1 1 , 1 12 may be approximately 90cm long. The distance between the parallel long bars 1 1 1 , 1 12 may be 19.5cm.

The distance between the facing bars 1 14 and the end of the parallel long bars 1 1 1 , 1 12 is at least the thickness of a base 310 and upright beam 330 combined. Preferably, the distance is greater than that of the thickness of a base 310 and upright beam 330 combined so that a wing nut 302, or other securing fastener, may be threaded onto each of the bar 1 1 1 , 1 12 ends.

Figure 33 illustrates the inside face 315 of a base 310. The base 310 comprises two feet 31 1 and a main body portion 317. The feet 31 1 are shaped to rest stably on a flat surface. The main body 317 curves between the feet 31 1 and extends in a vertical direction. In the middle of the main body 317 there are two bore holes 313 vertically spaced apart which pass through the base. Near to the top edge are handles 312, which preferably comprise cutout portions, for ease of transportation of the base 310.

Figure 34 illustrates the outside face 316 of a base 310. In addition to the features of the inside face 315, the outside face 316 has a recessed portion 314 between and surrounding the bore holes 313. The recessed portion 314 may be substantially lozenge shaped. The base 310 may be made from a generally planar material, and may be formed from a board material such as plywood. Typically, the height of the base 310 may be around 45cm and the width of the base may be around 60cm.

Figure 35 illustrates the outside face 334 of an upright beam 330. The upright beam 330 is elongate in the vertical direction. Near to the bottom end of the upright beam 330 there are two vertically spaced apart bore holes 331 which are spaced apart a corresponding distance with the bore holes 313 of a base 310. Between and surrounding the bore holes 331 is a recessed area 335 for receiving a reinforcing plate. The top half of the upright beam 330 has a number of vertically spaced apart holes 332 for receiving a cross bar 340, 345.

Figure 36 illustrates the inside face 333 of a similar upright beam 330 as that shown in figure 35. In this example there is no recess on the inside face 333.

The upright beams 330 may comprise wooden beams. The cross-section of each beam 330 may be around 5cm by 7.5cm and the length of the beam may be around 1 .5m.

Figure 37 illustrates a first cross bar 340 and an alternative cross bar 345. The first cross bar 340 has a short section 341 bent over to provide an angled L shape to the end. At the opposite end, a pin 342 extends through an aperture formed in the cross bar 340. The alternative cross bar 345 is T shaped at one end 346. At the opposite end 347, the bar is threaded and a nut is secured on the end.

The cross bar 340, 345 may (in either case) be made from metal. The length of the cross bar 340, 345 corresponds to the width of the workers bench assembly 300 determined by the parallel long bars 1 1 1 , 1 12. Figure 38 illustrates an end view of a steel worker's bench assembly 300. The first end 1 16 of the bracing bar arrangement 1 10 is threaded through the bore holes 313 of a first base 310, and then through the bore holes 331 of a first upright beam 330. The base 310 and the upright beam 330 are secured in position with wing nuts 302. The second end 1 17 of the bracing bar arrangement 1 10 is threaded through the bore holes 313 of a second base 310, and then through the bore holes 331 of a second upright beam 330. The second base 310 and the second upright beam 330 are secured in position with two more wing nuts 302. A cross bar 345 is threaded through corresponding holes 332 in each of the upright beams 330. The end 347 of the cross bar 345 may be secured with a nut or stopper. As shown in figure 38, a beam 7 is positioned between the fixed bar 1 18 and the movable plate 1 19 of the bracing bar arrangement 1 10. The moveable plate 1 19 and the wing nuts 102 are not yet tightened against a beam 7.

The beam 7 may comprise any elongate element that may be available on a building site, such as an elongate rafter or plank. The coupling arrangements are adapted to grip beams of varying widths and so beams of different kinds can be used. A user may take subassemblies to a worksite, and plan to use any suitable beam 7 to complete the bench.

Accordingly, two steel worker's bench subassemblies may be assembled to provide a steel workers bench assembly 300. Figure 31 illustrates a steel workers bench assembly 300 with two subassemblies joined with a beam 7. Together, the arrangement provides a stable and strong work bench for a steel worker. The upper bar of the long parallel bars 1 1 1 , 1 12 of the bracing arrangement 1 10 of each of the subassemblies, provides a surface on which a steel worker can store materials while assembling a workpiece or use as a construction surface. In use the steel worker may assemble a steel cage and other steel arrangements for use in construction. The steel workers bench provides a stable and secure bench for constructing a steel cage on the cross bar 340, 345 or between the bracing bar assembly 1 10 and the cross bar 340, 345. Figure 40 illustrates a steels workers bench assembly 300 similar to that shown in figure 31 . In figure 10, a work piece 350 is resting on the cross bar 340 of each of the subassemblies.

If the steel worker wanted to make a longer cage than allowed by a single beam 7, additional steel workers bench subassemblies may be added adjacent to the first assemblies until the bench is long enough. For example, the clamp mechanism could open wide enough to receive the end of two beams 7, where the beams 7 extend away from a first subassembly in opposite directions. The opposite end of each beam 7 would then be clamped in the clamping mechanism of an additional subassembly. In an alternative arrangement the bracing arrangement 1 10 may have two clamping mechanisms, with a shared fixed bar 1 18 or second fixed bar 1 18, thus it would be possible to secure two beams 7 separately. It will be apparent from the foregoing that several subassemblies may be used together to form a 'daisy chain' of subassemblies. The number of beams 7 to make the 'daisy chain' will be one less than the number of subassemblies used. The first subassembly of the chain will clamp one end of the first beam 7. The second subassembly will clamp the other end of the first beam 7, and a first end of a second beam 7. Subsequent subassemblies will claim the second end of the previous beam 7 and the first end of a subsequent beam, until the last subassembly in the chain which will clamp the second end of the last beam 7. Thus, a 'daisy chain' of any length may be made. In an alternative arrangement, the subassemblies could be 'chained' together with other types of work bench. As noted above, a steel cage may be constructed using the bracing arrangement 1 10 or cross bar 340, 345 as a work surface. As the cage is constructed, it may extend in a vertical direction. While working, the steel worker may remove the cross bar 340, 345 and replace it at a another level, through corresponding bore holes 332 depending on what is most convenient for the worker. Generally, placing the cross bar 340, 345 through lower holes 332 will make the subassembly frame more rigid.

Figure 39 illustrates the steel worker's bench assembly in a 'quick release' arrangement. When the steel worker has completed constructing the steel cage 350, it will be positioned between the upright beams 330 on the sides, the bracing bar arrangement 1 10 on the bottom and the cross bar 340, 345 at the top. If the worker is using the cross bar 340, 345 as the work surface, the cross bar 340, 345 is first removed and the work piece lowered to rest on the bracing bar arrangement 1 10. Often the cage produced by the steel worker will be very long and it would be impractical for the steel worker to remove the cage 350 from one end of the work bench because there might not be room on site, or because the cage 350 is too big to be moved by hand and requires use of a crane.

Using the steel workers bench 300 as described herein, the steel worker may remove one of the sides of the subassemblies by removing the cross bar 340, 345 and releasing the wing nuts 302 on one side. The upright beams 330 on that side may then be removed, allowing free access to the steel cage 350 on one side. Base 310 is free-standing when the upright beams 330 are removed.

Thus, the steel worker's bench 300 is specifically designed for the purpose of constructing steel cages on site. The bench 300 is adapted for convenient use and subassemblies may be used flexibly to construct the different steel arrangements that might be required on site. The specific proportions and size of the work benches described herein are not crucial. However, it will be understood that the dimensions should be suitable for a worker to comfortably use the work bench. When used in this specification and claims, the terms "comprises" and "comprising" and variations thereof mean that the specified features, steps or integers are included. The terms are not to be interpreted to exclude the presence of other features, steps or components. The features disclosed in the foregoing description, or the following claims, or the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for attaining the disclosed result, as appropriate, may, separately, or in any combination of such features, be utilised for realising the invention in diverse forms thereof.

Embodiments are set out in the following numbered clauses:

1. A work bench subassembly comprising:

a bracing arrangement presenting an upper support surface on which a workpiece may rest and a clamping mechanism beneath the upper support surface, and

two bench bases wherein the bench bases are removably attachable to the bracing arrangement at respective opposite ends thereof, and when the bench bases are attached to the bracing arrangement, the clamping mechanism is located between the two bench bases.

2. A work bench subassembly according to any preceding clause, further comprising:

two upright beams attachable to the work bench subassembly at opposite ends of the bracing arrangement; and a removable cross bar extending between each of the two upright beams above the support surface and providing secondary support between the two upright beams.

A work bench subassembly according to any preceding clause, wherein when attached to the bracing arrangement, the bench bases are substantially perpendicular to the bracing arrangement.

A work bench subassembly according to any preceding clause, wherein the bracing arrangement comprises two parallel long bars, the ends of which are secured through the bench bases.

A work bench subassembly according to any preceding clause, wherein the clamping mechanism comprises a fixed bar and at least one movable plate which are both substantially perpendicular to the two parallel long bars.

A work bench subassembly according to any preceding clause, the bracing arrangement further comprising two face bars perpendicular to the two parallel long bars which, in use, abut the bench bases and determine the width of the work bench subassembly, and or located between the face bars.

A work bench subassembly according to clause 6, the clamping mechanism further comprising securement fixings located between the moveable plate and the face bars. A work bench subassembly according to clause 6 or 7, wherein the face bars are T or L beams to provide a flat face for abutting the bench bases. A work bench subassembly according to clause 7 or 8, wherein a portion of each of the length of the two parallel long bars is threaded and the securement fixings are wing nuts. A work bench subassembly according to any preceding clause, wherein each of the bench bases have boreholes for receiving respective ends of the bracing arrangement and wherein the bench bases are secured in position.

A work bench subassembly according to any preceding clause, wherein the ends of the bracing arrangement are threaded and the bench bases are secured with wing nuts. A work bench subassembly according to any of clauses 2 to 1 1 , wherein the upright beams have a number of corresponding vertically spaced apart holes for receiving opposite ends of the cross bar.

A work bench subassembly according to any of clauses 2 to 12, wherein the cross bar provides an alternative support surface on which a workpiece may rest.

A work bench subassembly according to any of clauses 12 to 13, wherein the height of the cross bar above the support surface may be varied.

A work bench subassembly according to any preceding clause, wherein each of the bench bases comprise at least one handle located proximate to an edge of the bench base. A work bench subassembly according to any preceding clause, wherein each of the bench bases comprises feet for resting on a surface and providing a sturdy support to the work bench subassembly.

A work bench assembly: comprising at least two work bench subassemblies according to any preceding clause joined by at least one beam.

A work bench assembly according to clause 17 wherein the at least one beam is secured in the clamping mechanism of each work bench subassembly. A work bench assembly according to clauses 17 or 18 comprising three subassemblies joined by two beams, wherein one end of each of the beams is clamped by the clamping mechanism of one of the subassemblies to form a chain of subassemblies.

A work bench assembly according to clause 19, comprising more than three subassemblies joined by a corresponding number of beams, wherein one end of each beam is claimed by the clamping mechanism of a first subassembly the other end of each beam is claimed by the clamping mechanism of the next subassembly in the chain.

A work bench assembly according to clauses 17 to 20 wherein, in use, the work bench assembly may be used to construct metal frames and when work on constructing the metal frame is complete, the work bench assembly may be at least partially disassembled to provide access to the metal frame. 22. A kit of parts for assembly into a work bench subassembly according to any of clauses 1 to 16, comprising a bracing assembly, two bench bases and two upright beams, and a plurality of wing nuts.

23. A kit of parts for assembly into a work bench assembly, comprising a beam and at least two kits for a work bench subassembly according to clause 21 .

24. A method of using a work bench according to any of clauses 17 to 21 or 23 comprising the steps of:

a. assembling at least two work bench subassemblies according to any of clauses 2 to 16 or 22;

b. joining the subassemblies into a work bench by clamping at least one beam between a pair of subassemblies;

c. constructing a workpiece on the support surface provided by the bracing arrangement or the cross bar;

d. on completion of the workpiece, removing one of the upright beams from each of the subassemblies on the same respective side; and

e. removing the workpiece from the work bench.

25. A work bench assembly or subassembly, or method substantially as hereinbefore described with reference to the accompanying drawings.

26. Any novel feature or combination of features disclosed therein. A work bench subassembly comprising: a bracing arrangement presenting an upper support surface on which a workpiece may rest and a clamping mechanism beneath the upper support surface, and two bench bases wherein the bench bases are removably attachable to the bracing arrangement at respective opposite ends thereof, and when the bench bases are attached to the bracing arrangement, the clamping mechanism is located between the two bench bases.